Spray booth



F. CHARAVAY SPRAY BOOTH May 27, 1930.

Filed Dec. 13, 1926 INVENTOR BY 4TORNEY Patented May 27, 1930 UNITED STATES rare FREDERICK CHARAVAY, OF PIQUA, OHIO, ASSIS-NGE, BY MESNE ASSIGNMENTS, OF

ONE-J-IALF TO HARTZELL INDUSTRIES, INCL, F WILMIIIGTON, DELAWARE, A. COR- PORATION OF DELAWARE SPRAY Boorn Application filed December 13, 1926. Serial No. 154,480.

This invention relates to new and useful im} roveinents in spray booths.

It is one of the principal objects of myinvention to provide a spray booth or enclosure P which is so constructed that the obnoxious and poisonous fluids sprayed into it will not flare back or roll out into the faces of the operators, but instead will be drawn through an edge outlet or outlets for discharge through a rear opening in the enclosure. In other words, the obnoxious and poisonous gases will be pulled out around the sides of the enclosure instead of rolling out into the face of an operator as at present. Thus, my improved spray booth construction promotes the health of the operators by protecting them from the obnoxious and poisonous fumes to which they are at present exposed when working in front of it or a like enclosure.

Other important and incidental objects will be brought out in the following specification and particularly set fourth in the subjoined claims.

In the accompanying drawings illustrating my invention, Figure 1 is a longitudinal, sectional view taken through a spray booth constructed in accordance with my invention, and Figure 2 is a cross sectional view taken through the same on the line 2-2 of Figure 1.

Referring to the accompanying drawmgs for a detailed description of my invention, he numeral 1 designates a booth such as that a which is employed to house an object or objects being sprayed with paint,-varnish or other fluid substances, although it may be a hood or other form of enclosure into which the fluid spray is introduced. Provided in the front part of the booth 1, which is open,

is a rectangular container 2 for the objects to be sprayed and which is also open at the front to receive the fluid sprayed into it. This container 2 is narrower at the rear than at the front, with its rear corners rounded, although they need not be.

The front end of the container 2 is positioned a short distance from a front marinal wall 3 of the booth 1, that terminates in n inwardly projecting flange part 4;. The

where the container tapers inwardly. Figure l) Behind an opening 7 in the rear portion of the booth l is a bracket 7 carryin a motor 8 to whose armature shaft 9 latt r is'spaced a sufiicient distance from the front part of the container 2 to form with it a narrow edge outlet or channel for the unused fluidspray that is introduced into the front portion of the booth.

The edge outlet or channel 5 communicates at the. front end of the container 2 with a wider channel or space 6 defined between said container and the side walls of the booth, said channel becoming wider at the points See there is secured a fan '10 preferably of the propeller type r I I 'When the fan 10 is rotated, it will pull the liquid spray, which usually includes obnoxious and poisonous gases, through the side out-lets 5 into the channels 6 as indicated by the arrows in Figure 2. Thence it is discharged through the fan 10 and opening 7 into the atmosphere at the rear of the booth without allowing any of said gases to flare back or roll out into the face of the operator in front of it. The booth is thus scavenged quickly and thoroughly of these obnoxious and poisonous gases, and as they'pass into the gradually enlarging rear parts of the channels 6, their velocity will be'decreased, causing'them to release there any sediment or lumpy material which they carried through the venturi portions of the side outlets.

Furthermore, the side drafts which the n creates, will pull all of the unused fluid ray through the edge outlets 5 for disarge through the opening 7 at the rear of the booth, as opposed to the discharge of some of it through the front portion of the latter into the face of the operator. The pull exerted by the fan 10 upon these gases is in a reverse direction to that of their entrance into the booth, causing them to roll or eddy to the edge outlets 5 in which the draft is created by tne fan.

It is to be understood that my invention is not to be limited to spray booths, but that it is applicable to enclosures of all kinds, and more particularly hoods, from which it is desirable to remove fluid vapors in such a manner that they will not roll out through the openings which received them, but Will rather be pulled out through edge outlets by a fan.

Having described my invention, I claim:

1. An enclosure having an opening adapted to receive a vapor, a front edge outlet for the vapor completely surrounding said opening, and fan means at the rear of said enclosure for pulling said vapor through the edge outlet.

2. An enclosure having a front opening adapted to receive a fluid spray, a container within said enclosurefor the objects to be sprayed, the front end of the container being spaced from the front wall of the outer enclosure, the front Wall of the latter being directed inwardly to form with the wall of the container an edge outlet for the spray, and

fan means behind the container for pulling the unused fluid spray through said edge outlet for the purpose specified. I

8. An enclosure having a front opening to receive a fluid spray, a container within the enclosure for the objects to be sprayed, the front wall of the container forming with the wall of the enclosure an edge outlet for the unused fluid spray, and fan means for pulling said spray through said edge outlet in a direction reverse to that of its entrance into the container.

i. A booth open at the front to receive a fluid spray, a container within the booth for the objects to be sprayed, said booth having a narrow front marginal wall turned inwardly to form a flange part, the front portion of the container forming with the said front wall and its inwardly turned portion an edge 7 outlet for the spray, the rear wall of the booth being provided with a discharge opening, and a fan behind said opening for pulling the unused fluid spray, out through said edge outlet and rear opening for the purpose speci- In witness whereof I have hereunto set my hand this 7th day of December, 1926.

- 7 FREDERICK GHARAVAY. 

